ancestor came from Bihar India

ancestor came from Bihar India

I am trying to locate Dookie family in a Province called Bihar in India ( eastern India) . My ancestor came from india around 1857 to British Guiana during the british labor force as indenture laborers. I was able to back track my ancestors history to Bihar. Dookie was married to Sinha but I am not sure if they got married in India or British Guiana. If you have an information or could tell me where I could find information on my ancestor, that would be greatly appreciated. Thanks